57
KSI Total
2015–2025 excl. 2020
18
Fatalities
People killed
127
Visible Injuries
City streets
463
Total Collisions
City streets only
12.3%
KSI Rate
57 / 463
7.5%
Alcohol KSI Rate
vs 13.1% non-alcohol
Annual collision trend by severity
2015–2025 excl. 2020 — gap marks excluded year
Severity breakdown
All city street collisions
Collision type distribution
Count by type
Primary collision factor
Top contributing factors
Collisions by hour of day
Red=late night · Yellow=PM peak
Day of week
Volume by weekday
What vehicle hit
Motor vehicle involved with
High Injury Network Explorer
Sorted by KSI · All years 2015–2025 excl. 2020 · City streets only
Era Comparison
2015–2019 (pre-COVID) vs 2021–2025 (post-COVID) Equal 5-year windows · 2020 excluded · All metrics normalizedKSI rate per year — trend
Blue=2015–19 · Orange=2021–25
Volume per year
Crash count trend by era
Collision type — KSI rate shift
Blue=era A · Orange=era B · Higher = more deadly per crash
Primary factor — volume/year
Is the mix of causes changing?
HIN Corridor Changes: 2015–19 vs 2021–25
The Safety Story: 2015–2019 vs 2021–2025
Equal 5-year periods · 2020 excluded · Stats normalized for fair comparisonKSI Rate: Broadly Stable
+0.9%
KSI rate: 12.25% → 12.36%. Relatively stable but not improving. Targeted investment needed to drive the rate meaningfully down.
Speed: #1 Cause of Crashes & KSI
7.6% → 5.6%
Unsafe Speed is the #1 PCF in Oakley with 120 crashes. Speed KSI rate: 7.6% (era A) → 5.6% (era B). Physical calming, feedback signs, and road diet evaluation are the priority responses.
MAIN ST: Worsening
4 → 11 KSI
MAIN ST is the #1 HIN corridor with 15 total KSI (2 fatal). KSI worsening era A→B — immediate capital intervention warranted.
HIN: Concentrated Risk
3 new corridors
3 new corridors emerged in 2021–25 not present in 2015–19. 6 corridors persist across both eras. Concentrated risk — targeted corridor investment is efficient.
Alcohol: Persistent Risk
4.8% → 8.7%
Alcohol KSI rate rose from 4.8% to 8.7%. At 8.7%, alcohol crashes remain 0.6× more deadly than non-alcohol. DUI enforcement must intensify.
Pedestrian KSI Rate Elevated
28.6% → 22.7%
Pedestrian KSI rate: 22.7% era B. 41.7% of ped crashes in dark conditions — LED lighting and RRFB crossings are the priority response.
Dark KSI Surging
15.6% → 17.8%
Dark-condition KSI rate surged: 15.6% → 17.8%. 137 dark crashes, 23 KSI. LED intersection lighting and retroreflective backplates deliver the highest BCR return.
Volume vs Severity
41/yr → 52/yr
Crash volume: 41/yr (era A) → 52/yr (era B). Both volume and severity trends require sustained investment.
Top Intersection: MAIN ST & BIG BREAK RD
2 KSI
MAIN ST & BIG BREAK RD — 2 KSI (0 fatal), 8 crashes. Era A: 0 KSI → Era B: 2 KSI. Targeted intersection capital recommended.
AI-Powered Safety Insights
Multivariate patterns · Oakley city streets 2015–2025 (excl. 2020) · Ranked by policy impact
Alcohol Multiplier Effect
0.6×
Alcohol KSI rate: 7.5% vs 13.1% non-alcohol. 14.5% of crashes, 8.8% of KSI.
DUI EnforcementDarkness Amplifies Severity
41.7%
Of pedestrian crashes occur in dark. After-dark ped crashes are 1.3× more likely to be fatal/severe than daytime (26.7% vs 20.0% KSI rate).
Street LightingBroadside KSI Rate
11.1%
Broadside KSI: 14.0% → 11.1% era A→B. Dominant type — signal and ROW failures drive this. LPI and Protected LT phasing address this pool.
Signal SafetyLate Night KSI Spike
22.2%
KSI rate 0–5 AM is 2.7× higher than midday (8.2%). 0.0% of crashes, concentrated fatal risk window.
High-Severity WindowAlcohol + Dark: Compound Risk
9.1%
Alcohol AND dark: KSI rate hits 9.1% — well above city average of 12.3%. Disproportionate harm from this combination.
Compound RiskMotorcycle Danger Window
31.8%
Motorcycle KSI rate: 31.8% — 2.6× city average. 44 crashes, 14 KSI. Late-night weekend is highest-risk window.
Motorcycle SafetyCollision type × severity heatmap
Darker = higher KSI rate
KSI rate by time of day
When is each crash most likely to be fatal or severe?
Annual KSI vs total collisions
Volume declining but severity rising — the key trend
Top 5 corridors — KSI persistence
Dangerous year after year
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Showing
—
KSI
—
Fatal
—
KSI Rate
Severity
Fatal
Severe
Visible
Pain
SS4A FY2026 Implementation Grant — Project Portfolio
Three plans based on 2021–2025 post-COVID crash data · May 26, 2026 deadline
HSIP Cycle 13 — Project Recommendations
Cross-cycle C8–C12 analysis · Oakley award history · 2021–2025 crash data
$5M–$18M est. portfolio
HSIP Grant Intelligence Module
Synthesized from Cross-Cycle Analysis C8–C12 · Countermeasure Trends · C12 Report & Funded Projects List
$0.54M
Oakley HSIP Won
C12
1
Projects Funded
Prior award cycles
$1.15B
Program Total
1,281 projects C8–C12
$5–18M
C13 Portfolio Target
6 recommendations
Oakley HSIP Application History
C13 Statewide Intelligence
🚀 Rising Countermeasures (C8→C12)
Gaining frequency & funding — prioritize for C13
LPI: 0→33 projects · +33
RRFB/Beacons: 11→57 · +46
Retroreflective Backplates: 1→23 · +22
Class IV Bike Lanes: 14→31 · +17
Raised Medians: 8→19 · +11
📉 Declining Countermeasures
Losing funding share — supplement but don't lead with these
Signal Timing Only: 45→12 · -33
Striping/Delineation Only: 28→9 · -19
Guardrail: 22→8 · -14
Rumble Strips Only: 11→4 · -7
BCR Sweet Spot
$1.5M–$4M
Oakley should target $1.5–3.5M per BCR application. Stack 3+ countermeasures for highest BCR score.
Best Win Strategy
3-CM Stack
C12 winners averaged 3+ countermeasures per application. Prior C12 wins provide competitive positioning.
VRU Pool
69 VRU
36 ped + 33 bike = 18 KSI. Qualifies for VRU Special Rule set-aside.